root / drupal7 / sites / all / libraries / simplepie / library / SimplePie / Locator.php @ 41cc1b08
| 1 |
<?php
|
|---|---|
| 2 |
/**
|
| 3 |
* SimplePie
|
| 4 |
*
|
| 5 |
* A PHP-Based RSS and Atom Feed Framework.
|
| 6 |
* Takes the hard work out of managing a complete RSS/Atom solution.
|
| 7 |
*
|
| 8 |
* Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
|
| 9 |
* All rights reserved.
|
| 10 |
*
|
| 11 |
* Redistribution and use in source and binary forms, with or without modification, are
|
| 12 |
* permitted provided that the following conditions are met:
|
| 13 |
*
|
| 14 |
* * Redistributions of source code must retain the above copyright notice, this list of
|
| 15 |
* conditions and the following disclaimer.
|
| 16 |
*
|
| 17 |
* * Redistributions in binary form must reproduce the above copyright notice, this list
|
| 18 |
* of conditions and the following disclaimer in the documentation and/or other materials
|
| 19 |
* provided with the distribution.
|
| 20 |
*
|
| 21 |
* * Neither the name of the SimplePie Team nor the names of its contributors may be used
|
| 22 |
* to endorse or promote products derived from this software without specific prior
|
| 23 |
* written permission.
|
| 24 |
*
|
| 25 |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
|
| 26 |
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
| 27 |
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
|
| 28 |
* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
| 29 |
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
| 30 |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
| 31 |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
| 32 |
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
| 33 |
* POSSIBILITY OF SUCH DAMAGE.
|
| 34 |
*
|
| 35 |
* @package SimplePie
|
| 36 |
* @version 1.3.1
|
| 37 |
* @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
|
| 38 |
* @author Ryan Parman
|
| 39 |
* @author Geoffrey Sneddon
|
| 40 |
* @author Ryan McCue
|
| 41 |
* @link http://simplepie.org/ SimplePie
|
| 42 |
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
|
| 43 |
*/
|
| 44 |
|
| 45 |
/**
|
| 46 |
* Used for feed auto-discovery
|
| 47 |
*
|
| 48 |
*
|
| 49 |
* This class can be overloaded with {@see SimplePie::set_locator_class()}
|
| 50 |
*
|
| 51 |
* @package SimplePie
|
| 52 |
*/
|
| 53 |
class SimplePie_Locator |
| 54 |
{
|
| 55 |
var $useragent; |
| 56 |
var $timeout; |
| 57 |
var $file; |
| 58 |
var $local = array(); |
| 59 |
var $elsewhere = array(); |
| 60 |
var $cached_entities = array(); |
| 61 |
var $http_base; |
| 62 |
var $base; |
| 63 |
var $base_location = 0; |
| 64 |
var $checked_feeds = 0; |
| 65 |
var $max_checked_feeds = 10; |
| 66 |
protected $registry; |
| 67 |
|
| 68 |
public function __construct(SimplePie_File $file, $timeout = 10, $useragent = null, $max_checked_feeds = 10) |
| 69 |
{
|
| 70 |
$this->file = $file; |
| 71 |
$this->useragent = $useragent; |
| 72 |
$this->timeout = $timeout; |
| 73 |
$this->max_checked_feeds = $max_checked_feeds; |
| 74 |
|
| 75 |
if (class_exists('DOMDocument')) |
| 76 |
{
|
| 77 |
$this->dom = new DOMDocument(); |
| 78 |
|
| 79 |
set_error_handler(array('SimplePie_Misc', 'silence_errors')); |
| 80 |
$this->dom->loadHTML($this->file->body); |
| 81 |
restore_error_handler(); |
| 82 |
} |
| 83 |
else
|
| 84 |
{
|
| 85 |
$this->dom = null; |
| 86 |
} |
| 87 |
} |
| 88 |
|
| 89 |
public function set_registry(SimplePie_Registry $registry) |
| 90 |
{
|
| 91 |
$this->registry = $registry; |
| 92 |
} |
| 93 |
|
| 94 |
public function find($type = SIMPLEPIE_LOCATOR_ALL, &$working) |
| 95 |
{
|
| 96 |
if ($this->is_feed($this->file)) |
| 97 |
{
|
| 98 |
return $this->file; |
| 99 |
} |
| 100 |
|
| 101 |
if ($this->file->method & SIMPLEPIE_FILE_SOURCE_REMOTE) |
| 102 |
{
|
| 103 |
$sniffer = $this->registry->create('Content_Type_Sniffer', array($this->file)); |
| 104 |
if ($sniffer->get_type() !== 'text/html') |
| 105 |
{
|
| 106 |
return null; |
| 107 |
} |
| 108 |
} |
| 109 |
|
| 110 |
if ($type & ~SIMPLEPIE_LOCATOR_NONE) |
| 111 |
{
|
| 112 |
$this->get_base();
|
| 113 |
} |
| 114 |
|
| 115 |
if ($type & SIMPLEPIE_LOCATOR_AUTODISCOVERY && $working = $this->autodiscovery()) |
| 116 |
{
|
| 117 |
return $working[0]; |
| 118 |
} |
| 119 |
|
| 120 |
if ($type & (SIMPLEPIE_LOCATOR_LOCAL_EXTENSION | SIMPLEPIE_LOCATOR_LOCAL_BODY | SIMPLEPIE_LOCATOR_REMOTE_EXTENSION | SIMPLEPIE_LOCATOR_REMOTE_BODY) && $this->get_links()) |
| 121 |
{
|
| 122 |
if ($type & SIMPLEPIE_LOCATOR_LOCAL_EXTENSION && $working = $this->extension($this->local)) |
| 123 |
{
|
| 124 |
return $working; |
| 125 |
} |
| 126 |
|
| 127 |
if ($type & SIMPLEPIE_LOCATOR_LOCAL_BODY && $working = $this->body($this->local)) |
| 128 |
{
|
| 129 |
return $working; |
| 130 |
} |
| 131 |
|
| 132 |
if ($type & SIMPLEPIE_LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere)) |
| 133 |
{
|
| 134 |
return $working; |
| 135 |
} |
| 136 |
|
| 137 |
if ($type & SIMPLEPIE_LOCATOR_REMOTE_BODY && $working = $this->body($this->elsewhere)) |
| 138 |
{
|
| 139 |
return $working; |
| 140 |
} |
| 141 |
} |
| 142 |
return null; |
| 143 |
} |
| 144 |
|
| 145 |
public function is_feed($file) |
| 146 |
{
|
| 147 |
if ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE) |
| 148 |
{
|
| 149 |
$sniffer = $this->registry->create('Content_Type_Sniffer', array($file)); |
| 150 |
$sniffed = $sniffer->get_type(); |
| 151 |
if (in_array($sniffed, array('application/rss+xml', 'application/rdf+xml', 'text/rdf', 'application/atom+xml', 'text/xml', 'application/xml'))) |
| 152 |
{
|
| 153 |
return true; |
| 154 |
} |
| 155 |
else
|
| 156 |
{
|
| 157 |
return false; |
| 158 |
} |
| 159 |
} |
| 160 |
elseif ($file->method & SIMPLEPIE_FILE_SOURCE_LOCAL) |
| 161 |
{
|
| 162 |
return true; |
| 163 |
} |
| 164 |
else
|
| 165 |
{
|
| 166 |
return false; |
| 167 |
} |
| 168 |
} |
| 169 |
|
| 170 |
public function get_base() |
| 171 |
{
|
| 172 |
if ($this->dom === null) |
| 173 |
{
|
| 174 |
throw new SimplePie_Exception('DOMDocument not found, unable to use locator'); |
| 175 |
} |
| 176 |
$this->http_base = $this->file->url; |
| 177 |
$this->base = $this->http_base; |
| 178 |
$elements = $this->dom->getElementsByTagName('base'); |
| 179 |
foreach ($elements as $element) |
| 180 |
{
|
| 181 |
if ($element->hasAttribute('href')) |
| 182 |
{
|
| 183 |
$base = $this->registry->call('Misc', 'absolutize_url', array(trim($element->getAttribute('href')), $this->http_base)); |
| 184 |
if ($base === false) |
| 185 |
{
|
| 186 |
continue;
|
| 187 |
} |
| 188 |
$this->base = $base; |
| 189 |
$this->base_location = method_exists($element, 'getLineNo') ? $element->getLineNo() : 0; |
| 190 |
break;
|
| 191 |
} |
| 192 |
} |
| 193 |
} |
| 194 |
|
| 195 |
public function autodiscovery() |
| 196 |
{
|
| 197 |
$done = array(); |
| 198 |
$feeds = array(); |
| 199 |
$feeds = array_merge($feeds, $this->search_elements_by_tag('link', $done, $feeds)); |
| 200 |
$feeds = array_merge($feeds, $this->search_elements_by_tag('a', $done, $feeds)); |
| 201 |
$feeds = array_merge($feeds, $this->search_elements_by_tag('area', $done, $feeds)); |
| 202 |
|
| 203 |
if (!empty($feeds)) |
| 204 |
{
|
| 205 |
return array_values($feeds); |
| 206 |
} |
| 207 |
else
|
| 208 |
{
|
| 209 |
return null; |
| 210 |
} |
| 211 |
} |
| 212 |
|
| 213 |
protected function search_elements_by_tag($name, &$done, $feeds) |
| 214 |
{
|
| 215 |
if ($this->dom === null) |
| 216 |
{
|
| 217 |
throw new SimplePie_Exception('DOMDocument not found, unable to use locator'); |
| 218 |
} |
| 219 |
|
| 220 |
$links = $this->dom->getElementsByTagName($name); |
| 221 |
foreach ($links as $link) |
| 222 |
{
|
| 223 |
if ($this->checked_feeds === $this->max_checked_feeds) |
| 224 |
{
|
| 225 |
break;
|
| 226 |
} |
| 227 |
if ($link->hasAttribute('href') && $link->hasAttribute('rel')) |
| 228 |
{
|
| 229 |
$rel = array_unique($this->registry->call('Misc', 'space_seperated_tokens', array(strtolower($link->getAttribute('rel'))))); |
| 230 |
$line = method_exists($link, 'getLineNo') ? $link->getLineNo() : 1; |
| 231 |
|
| 232 |
if ($this->base_location < $line) |
| 233 |
{
|
| 234 |
$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base)); |
| 235 |
} |
| 236 |
else
|
| 237 |
{
|
| 238 |
$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base)); |
| 239 |
} |
| 240 |
if ($href === false) |
| 241 |
{
|
| 242 |
continue;
|
| 243 |
} |
| 244 |
|
| 245 |
if (!in_array($href, $done) && in_array('feed', $rel) || (in_array('alternate', $rel) && !in_array('stylesheet', $rel) && $link->hasAttribute('type') && in_array(strtolower($this->registry->call('Misc', 'parse_mime', array($link->getAttribute('type')))), array('application/rss+xml', 'application/atom+xml'))) && !isset($feeds[$href])) |
| 246 |
{
|
| 247 |
$this->checked_feeds++;
|
| 248 |
$headers = array( |
| 249 |
'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1', |
| 250 |
); |
| 251 |
$feed = $this->registry->create('File', array($href, $this->timeout, 5, $headers, $this->useragent)); |
| 252 |
if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed)) |
| 253 |
{
|
| 254 |
$feeds[$href] = $feed; |
| 255 |
} |
| 256 |
} |
| 257 |
$done[] = $href; |
| 258 |
} |
| 259 |
} |
| 260 |
|
| 261 |
return $feeds; |
| 262 |
} |
| 263 |
|
| 264 |
public function get_links() |
| 265 |
{
|
| 266 |
if ($this->dom === null) |
| 267 |
{
|
| 268 |
throw new SimplePie_Exception('DOMDocument not found, unable to use locator'); |
| 269 |
} |
| 270 |
|
| 271 |
$links = $this->dom->getElementsByTagName('a'); |
| 272 |
foreach ($links as $link) |
| 273 |
{
|
| 274 |
if ($link->hasAttribute('href')) |
| 275 |
{
|
| 276 |
$href = trim($link->getAttribute('href')); |
| 277 |
$parsed = $this->registry->call('Misc', 'parse_url', array($href)); |
| 278 |
if ($parsed['scheme'] === '' || preg_match('/^(http(s)|feed)?$/i', $parsed['scheme'])) |
| 279 |
{
|
| 280 |
if ($this->base_location < $link->getLineNo()) |
| 281 |
{
|
| 282 |
$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base)); |
| 283 |
} |
| 284 |
else
|
| 285 |
{
|
| 286 |
$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base)); |
| 287 |
} |
| 288 |
if ($href === false) |
| 289 |
{
|
| 290 |
continue;
|
| 291 |
} |
| 292 |
|
| 293 |
$current = $this->registry->call('Misc', 'parse_url', array($this->file->url)); |
| 294 |
|
| 295 |
if ($parsed['authority'] === '' || $parsed['authority'] === $current['authority']) |
| 296 |
{
|
| 297 |
$this->local[] = $href; |
| 298 |
} |
| 299 |
else
|
| 300 |
{
|
| 301 |
$this->elsewhere[] = $href; |
| 302 |
} |
| 303 |
} |
| 304 |
} |
| 305 |
} |
| 306 |
$this->local = array_unique($this->local); |
| 307 |
$this->elsewhere = array_unique($this->elsewhere); |
| 308 |
if (!empty($this->local) || !empty($this->elsewhere)) |
| 309 |
{
|
| 310 |
return true; |
| 311 |
} |
| 312 |
return null; |
| 313 |
} |
| 314 |
|
| 315 |
public function extension(&$array) |
| 316 |
{
|
| 317 |
foreach ($array as $key => $value) |
| 318 |
{
|
| 319 |
if ($this->checked_feeds === $this->max_checked_feeds) |
| 320 |
{
|
| 321 |
break;
|
| 322 |
} |
| 323 |
if (in_array(strtolower(strrchr($value, '.')), array('.rss', '.rdf', '.atom', '.xml'))) |
| 324 |
{
|
| 325 |
$this->checked_feeds++;
|
| 326 |
|
| 327 |
$headers = array( |
| 328 |
'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1', |
| 329 |
); |
| 330 |
$feed = $this->registry->create('File', array($value, $this->timeout, 5, $headers, $this->useragent)); |
| 331 |
if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed)) |
| 332 |
{
|
| 333 |
return $feed; |
| 334 |
} |
| 335 |
else
|
| 336 |
{
|
| 337 |
unset($array[$key]); |
| 338 |
} |
| 339 |
} |
| 340 |
} |
| 341 |
return null; |
| 342 |
} |
| 343 |
|
| 344 |
public function body(&$array) |
| 345 |
{
|
| 346 |
foreach ($array as $key => $value) |
| 347 |
{
|
| 348 |
if ($this->checked_feeds === $this->max_checked_feeds) |
| 349 |
{
|
| 350 |
break;
|
| 351 |
} |
| 352 |
if (preg_match('/(rss|rdf|atom|xml)/i', $value)) |
| 353 |
{
|
| 354 |
$this->checked_feeds++;
|
| 355 |
$headers = array( |
| 356 |
'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1', |
| 357 |
); |
| 358 |
$feed = $this->registry->create('File', array($value, $this->timeout, 5, null, $this->useragent)); |
| 359 |
if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed)) |
| 360 |
{
|
| 361 |
return $feed; |
| 362 |
} |
| 363 |
else
|
| 364 |
{
|
| 365 |
unset($array[$key]); |
| 366 |
} |
| 367 |
} |
| 368 |
} |
| 369 |
return null; |
| 370 |
} |
| 371 |
} |
| 372 |
|